17" tire size - Mercedes Benz SLK Forum

Tires, Wheels, Brakes & Suspension Discussion and information regarding tires, wheels, brakes and suspension.

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#1 Old 04-09-2015
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17" tire size

Hi, I'm getting new tires/rims and I have some questions.

It's on stock suspension. I'm definitely going with 17" rims (7.5 front, 8.5 rear)

Is anyone running 255 rears on 17s?

What is the widest rear tire without rubbing or other issues?

If I can go 255/40/17 on rears, what would be the best tire size for fronts? 225/45/17?

One last question...Is there a secret web site with 8.5 " wide 17" rims?? I've been searching and 17 x 8.5 seems incredibly rare and the selection is extremely limited??

Thanks.

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#2 Old 04-10-2015
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I'm bumping this thread.
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#3 Old 04-10-2015
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According to this :

Mercedes-Benz Fitting Chart and Wheel Fitment Guide | Alloy Wheels Direct

In 18" you can mount 255's on the rear , so I wouldn't think 17's would be any different !

I wouldn't go any wider than 225 on the front though , to avoid the possibility of rubbing when fully locked ...


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#4 Old 04-11-2015
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Thanks for your reply.

I have looked at that chart, but I'm interested in experiences from real people.

In my experience, what MB/BMW/Audi "recommend" or "approve" and what is possible in reality can be 2 different things.

Thanks.
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#5 Old 04-11-2015
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Looks like I'm replying to myself, doesn't it? LOL.

Thank you @curro101. I've noticed you are always very helpful and willing to give your help on here in a very friendly way. I just wanted to thank you for that.

In case you weren't sure, he posted the above - not me. And no, I don't have a split personality! There are 2 of us on this username. If there are smiley faces - it's me posting. If not, it's him posting :-) It sounded like he didn't think you were real. Made me laugh out loud. I told him.....you're real alright!!!

We're a bit frustrated because in Germany, you can't deviate from the approved rim sizes without an act of congress. And I mean that!

We cannot put 18s on our girl. So, we have to keep to the 17s and we're not sure if 255 rears can go on a 17x8 or a 17x8.5.

I refuse to spend money on rims I don't like just because they are the approved size. According to them.

So....thank you again.

Jo

Been trying to get new rims since we got her!!!
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#6 Old 04-12-2015
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According to this :

http://www.lvvta.org.nz/documents/in...lity_Guide.pdf

8.5 is the minimum for 255 !

Hopefully someone who has actually put that size tyre on can confirm if it fits ok , although I think it's going to be a lot less hassle , if you stick to 245's on the rear ....
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#7 Old 04-14-2015
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I can confirm 255 fits okay on 8.5J rims. Been running with them for years now, no problem at all.

I'm just wondering why you say you can't put on 18 inch rims on your R170 in Germany. If you look for aftermarket rims, ie Borbet, they are allowed. Ie Borbet delivers rims for the R170 up to 19 inch withe ABE. ABE stands for Allgemeine Betriebs Erlaubnis, it's a official certificate that is included with the rims when you buy them, which you can show the police in the event of you need to prove to the officer that the rims you have on your car are allowed.
I can't see any reason why you wouldn't be allowed to put 18 inch rims on your car. Take a look at a random german rim manufacturer, every rim they supply is accompanied by a ABE certificate, which indeed is mandatory in Germany.
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#8 Old 04-14-2015
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Quote:
Originally Posted by clown View Post
Hi, I'm getting new tires/rims and I have some questions.

It's on stock suspension. I'm definitely going with 17" rims (7.5 front, 8.5 rear)

Is anyone running 255 rears on 17s?

What is the widest rear tire without rubbing or other issues?

If I can go 255/40/17 on rears, what would be the best tire size for fronts? 225/45/17?

One last question...Is there a secret web site with 8.5 " wide 17" rims?? I've been searching and 17 x 8.5 seems incredibly rare and the selection is extremely limited??

Thanks.
For example mine is 17 x 8,5 at the rear, runs with 245/40 tyres.
It is original AMG, available in used on many sites mines are from Gumtree.
I have TV certificate for these wheels too so I think it would be OK for Germany too.
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#9 Old 04-18-2015
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Thanks for the replies.

I'm only interested in NON-Mercedes/AMG rims.

Most Mercedes/AMG rims are easily available in 17 x 8.5, however, most aftermarket rim manufacturers do not offer 17 x 8.5.

Thanks for your help.
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#10 Old 05-08-2015
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Thought I'd finish off and update after opening this thread.

Thank you for your thoughts and suggestions. This really was driving me crazy.

You are indeed right about the ABEs in Germany, however......an ABE does not automatically guarantee the rims are allowed on the car.

There's always the small print or "conditions" that must be adhered to on the ABE. I know more about this in German now than I do in English!

For example, the rims I decided to have (MSW by OZ in titanium) are 8x17s all round. No problem if I wanted to run with 205 fronts. 😝

I wanted 225 fronts and 245 rears after the advice you all gave me - thank you 👍 Definitely a staggered set-up.

According to the German ABE for these rims (and most other after-markets) - 225s were not possible on the front of an R170 without rolling the fenders/wings. 😕

Rears - no problem up to 245s without rolling the fenders.

Frustrating for me because I knew a lot of you were running with them with no problems 😠

So, had to buy the rims and the tyres, put them on, take the car the the testing station (TV) and cross my fingers they would get approved. I kid you not.

I did pop by with the ABE before hand and asked his professional opinion - he said, "Maybe."
I had no choice.

Long story short - he approved my chosen after-market 8x17 rims with 225 fronts and 245 rears. The gamble paid off. I now have to carry a separate document in the car at all times proving this in case die Polizei stop me.

They have weapons. I'm a Brit. That's a big thing for me 😦

Noticed the following today with the new 225 / 245 set-up:

The car handles like a dream. I noticed a BIG difference on the handling compared to original 205s/215s I had on her when I bought her. More solid and sure on the road. Got her up on the Autobahn today and really noticed the difference. Really.

I'm a happy girl 😄

Another thing to mention is that it is not common to run staggered here. People looked at me as if I was a martian when I told them I wanted to. Interesting, eh?

Anyhooooo, thanks again for all your input. I was doing this in a foreign country, in a foreign language. I really appreciate all of your help.

Have a fab weekend,

Jo
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#11 Old 05-08-2015
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Glad you got it sorted !!


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